新型电磷光咔唑-co-吡啶共聚物的合成与发光性能  

Synthesis and Light-emitting Properties of Novel Electrophosphorescent Poly(carbazole-co-pyridine)

作　　者：张安琪[1] 邹建华[1] 应磊[1] 陈奇良[1] 陈冰[1] 杨伟[1] 曹镛[1] 

机构地区：[1]华南理工大学高分子光电材料与器件研究所教育部特种功能材料重点实验室,广州510640

出　　处：《化学学报》2009年第23期2745-2749,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.U0634003);科技部973计划(No.2009CB623601)资助项目

摘　　要：用Suzuki缩聚反应制备了一系列新型咔唑-吡啶共轭主链上含有金属铱配合物单元的共聚物.共聚物发光器件结构为ITO/PEDOT:PSS/polymer+PBD(w=30%)/CsF/Al[氧化铟锡/苯磺酸掺杂聚乙烯基二氧噻吩/聚合物+2,4-二苯-5-4-叔丁基苯-1,3,4-恶二唑(w=30%)/氟化铯/铝].基于共聚物PCzPyIrMppy2的器件在电流密度为20.8mA/cm2时,最大外量子效率和流明效率分别达到4.1%和6.1cd/A.在电流密度200mA/cm2时,器件的最大外量子效率和流明效率仍分别达到3.2%和4.8cd/A,器件的发光的最大波长位于570nm,最大亮度达到13251cd/m2.研究结果表明,在共轭聚合物主链上引入螯合金属铱配合单元是实现高效、稳定的电致磷光器件的有效方法之一.A series of novel poly（carbazole-co-pyridine）s conjugated with copolymerized chelated Ir complexes in the main chain were synthesized by Suzuki polycondensation. Based on such copolymers, the electroluminescent devices were fabricated with configuration of ITO/PEDOT：PSS/polymer＋PBD （w=30%）/ CsF/Al. The best device performances were achieved based on copolymer PCzPyIrMppy2, which showed the maximal quantum efficiency （QEext） and luminous efficiency （LE） of 4.1% and 6.1 cd/A, respectively, at current density （J） of 20.8 mA/cm^2. Besides, the QEext and LE remained 3.2% and 4.8 cd/A, respectively,with peak emission at 570 nm and maximal luminance of 13251 cd/m^2. This result indicated that incorporation of the phosphorescent complex into the conjugated polymer main chain was a new way to simultaneously realize high efficiency, long-term stability of phosphorescent polymer light-emitting diodes.

关 键 词：咔唑-co-吡啶共聚物 铱配合物 橙光发射 

分 类 号：O633.5[理学—高分子化学]